From: Charles Forsyth <charles.forsyth@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] A couple questions about /dev/draw and /dev/kbmap
Date: Thu, 5 May 2016 17:00:54 +0100 [thread overview]
Message-ID: <CAOw7k5hTO4KKP6Lg4yWp=tKuGJUjYz162VsDqRE=p_TrfMr85g@mail.gmail.com> (raw)
In-Reply-To: <3115414fc57b1a87c6ffe6744f4a65a0@felloff.net>
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On 5 May 2016 at 14:56, <cinap_lenrek@felloff.net> wrote:
> libdraw determines the iounit in initdraw() and sizes
> its write buffer accordingly. uploading pixels into a image
> will split the y/Y operation in multiple ones so they fit
> into the buffer.
>
Yes, and the data doesn't go through rio (unlike an older system), but to
/dev/draw, so in the local graphics
case the kernel is pulling the draw data directly from the client memory:
it doesn't go through 9p.
If /dev/draw is imported from a remote system, the local system will
generate the 9p, and the remote
will receive that, turn round and access its /dev/draw.
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next prev parent reply other threads:[~2016-05-05 16:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-04 20:20 Dave MacFarlane
2016-05-04 21:53 ` hiro
2016-05-05 2:45 ` cinap_lenrek
2016-05-05 13:12 ` Dave MacFarlane
2016-05-05 13:16 ` Aram Hăvărneanu
2016-05-05 13:56 ` cinap_lenrek
2016-05-05 16:00 ` Charles Forsyth [this message]
2016-05-05 15:38 ` Skip Tavakkolian
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